North America Native Plant

Connecticut Blackberry

Botanical name: Rubus rossbergianus

USDA symbol: RURO4

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Connecticut Blackberry: A Rare New England Native Worth Preserving If you’re a gardener who loves collecting rare native plants, you might want to add Connecticut blackberry (Rubus rossbergianus) to your wish list. This little-known member of the blackberry family is a true New England specialty that deserves more attention from ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Connecticut Blackberry: A Rare New England Native Worth Preserving

If you’re a gardener who loves collecting rare native plants, you might want to add Connecticut blackberry (Rubus rossbergianus) to your wish list. This little-known member of the blackberry family is a true New England specialty that deserves more attention from native plant enthusiasts.

What Makes Connecticut Blackberry Special?

Connecticut blackberry is a perennial shrub that stays refreshingly compact compared to its more rambunctious cousins. This low-growing beauty typically reaches just 1.5 feet tall and rarely exceeds 3 feet at maturity, making it perfect for gardeners who love blackberries but don’t have space for sprawling canes.

As its name suggests, this native gem calls the northeastern United States home, specifically growing in Connecticut, Massachusetts, Rhode Island, and Vermont. It’s a true regional treasure that has adapted to the unique growing conditions of lower New England.

Why Consider Growing Connecticut Blackberry?

Here’s where things get interesting – and important. Connecticut blackberry has a Global Conservation Status of S3?, which indicates it may be of conservation concern. This rarity status means that if you’re lucky enough to find this species, you’re not just adding a unique native plant to your garden; you’re potentially helping preserve a piece of New England’s natural heritage.

The Reality Check: Limited Availability and Information

Let’s be honest – Connecticut blackberry isn’t going to be sitting on the shelf at your local garden center. This rare native is challenging to find, and detailed growing information is surprisingly scarce even in botanical references. What we do know is that it’s a hardy perennial that has survived in New England’s variable climate for generations.

Growing Tips (Based on General Rubus Knowledge)

While specific care instructions for Connecticut blackberry are limited, we can draw from general Rubus family growing practices:

  • Plant in well-draining soil with good organic content
  • Provide partial to full sun exposure
  • Allow adequate air circulation to prevent fungal issues
  • Mulch around plants to retain moisture and suppress weeds
  • Prune dead or damaged canes in late winter

The Responsible Approach

If you’re determined to grow Connecticut blackberry, please source plants responsibly. Never collect from wild populations – this could harm already vulnerable native stands. Instead:

  • Contact native plant societies in New England
  • Work with specialized native plant nurseries
  • Consider participating in seed collection programs with botanical institutions
  • Join conservation efforts focused on rare native plants

Alternative Native Blackberries

While you’re searching for Connecticut blackberry, consider these more readily available native Rubus species that offer similar benefits:

  • American red raspberry (Rubus idaeus)
  • Black raspberry (Rubus occidentalis)
  • Common blackberry (Rubus allegheniensis)

The Bottom Line

Connecticut blackberry represents the fascinating world of rare native plants that exist right under our noses. While it may not be the easiest addition to your garden, it’s a reminder that our local flora holds surprises worth protecting and preserving. Whether you manage to grow this elusive species or simply appreciate it from afar, supporting rare native plants helps maintain the biodiversity that makes New England’s landscapes so special.

Sometimes the most rewarding plants aren’t the showiest ones – they’re the quiet survivors that connect us to our region’s unique natural heritage.

Connecticut Blackberry

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Rosales

Family

Rosaceae Juss. - Rose family

Genus

Rubus L. - blackberry

Species

Rubus rossbergianus Blanch. - Connecticut blackberry

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA